Electrode-holder for electric furnaces.



S. STEINBERG 6a I. GRAMULIN. ELEGIRODE HOLDER vFR ELECTRIC FUIIACES.`

APPLICATION FILEI)` IULY 19.1916.

Patented Qct. 1, 1918,

UNITED sTATEs PATEET oEEIoE.

sEnGIUs STEINBERG AND Icon enAIvIoLIN, or MoTowILIcHI, RUSSIA.,

ELECTRODE-HOLDER FOR FLE()[I RIC FURNACES.

Specification of Letters Patent.

Patented Got. 1, 1918.

Application led July 19, 1916. Serial No. 110,094.

T0 all whom it may concern.'

Be it known that we, SERoIUs STEINBERG and IGOR GRAMOLIN, subjects of the Czar of Russia, residing at Motowilichi, Government of Perm, Russia, have invented certain new and useful Improvements in Electrode- Holders for` Electric Furnaces, of which the following is a specification.

This invention relates to-electric furnaces of the resistance type for the purpose of melting steel. In the form of furnace which will be now described, the furnace chamber is similar to that of the ooinmonMartin furnace. One or more of its vertical sides are provided with openings through which niaf terial may be vcharged yinto the furnace or through Awhich the necessary metallurgical treatment may be performed, the openings being furnished as usual with closing` doors. @ne of the sides is provided, as usual, with an opening` to permit of the discharge of the melted steel, such opening being adapted to be closed by any suitable means.

The furnace chamber is constructed of a carbon or graphite mass, lis absolutely non` fusible andis adapted to absorb any traces of atmospheric oxygen entering into the furnace, and thus preventlng the carbon elec- The current may be direct, alternating or three-phase, and the size of the electrodes and the distribution of the current will depend upon the size of the furnace and the nature of the'electric current employed.

Each electrode 1a is vclamped between two 4 copper or graphite shoes Z) of special shape forming contact blocks whicharev screwed on to the copper bushesy 0 -which are ar ranged within suitable openings in the furnace walls, and are cooled by water circulation which is adapted to be passed through the hollow space formed therein. The bushes c are loosely arranged and mounted in the sides of the furnace within special openings and are pressed against the ends of the electrode a by screws e and through the medium of springs (l. Instead of spring compression a deadv load compression, such as a weight may also be employed. In this vway constantcontact between thel electrode a and the copper or graphite shoes b is in,nv

sured independently of the tension and compression due tothe heating and cooling of the electrodes a as well as thze'furnace chamber.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is Electrode holder for electricfurn'aces for the continuous treatment. of steel, comprising a furnace chamber in combination withE carbon electrodes extendingacross the chamber, block contacts abutting against each end of each electrode and situated inthe chamlation within the sleeves and spring and screw devices for pressing the sleeve upon the block contacts and thus Causing the latter to press upon and support vthe electrodes. v

In testimony ,whereof we aix our signatures in presence of two witnesses.

sERGIUs 'STEINBEEG. IeoE GEAMOLIN,

Vtnesses:

NICOLAI ALEXGEEF, RUTH Hausen.

The cooling water isv led into ther bushes or sleeves c through` the rubber and 'copperpipes f.

"so ber walls, hollow movable metallic. sleeves. for holding the` block contacts, water circu- 

